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WEATHERKING
TYPICAL WPH SERIES
Existing
Function
Terminals
or
or
Common
X
C1
C
Power
R
or
Compressor
Y
W1
1st Stage
–
Heat
or
Aux. Heat
W2
E
Fan
G
C/O Valve
B
Heat
or
C/O Valve
O
Y1
Cool
or
System Monitor/
L
X
System Defrost
Em. Heat
E
Multiple Aux.
W3
Heat Loads
LED Indication
–
2nd Stage
–
Compressor
2nd Stage
–
Cool
Configure O/B (select models) in Installer Setup.
When W2 is not used, configure W2 cycle rate to NC.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
LED is energized when terminal is powered.
L terminal is powered continuously when thermostat is in Em. Ht. position.
Terminal must be connected to the transformer common.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER OR CUSTOMER PART NUMBER
T841A1373
70-6627 • 102
Electromechanical
X
X
X
R
R
R
Y
Y
Y1
–
W1
W1
W2
W2
W2
G
G
G
B
B
B
O
O
O
L
X1
E
E
E
W3
W3
W3
X2
X2
–
–
–
–
–
–
Electronic Replacement or Upgrade
Chronotherm
®
III
C
C
R
R
or
Y1
Y
Y
W1
W1
W2
W2
G
G
B
B
O
O
L
L
E
E
X1 X2
–
–
–
–
–
Do not remove factory-installed jumper.
Optional Check LED on T8611G1004. See Fig. 26.
Field-installed X2 to X (C) jumper.
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
T8141A1105
Chronotherm
IV
C
C
C
R
R
R
Y1
Y
Y1
W1
W1
W1
W2
W2
W2
G
G
G
or
or
B
O/B
B
B
or
or
O
O/B
O
O
L
L
L
E
E
E
–
–
X1 X2
–
–
–
–
–
–
GE 3AAT80
C
R
Y1/W1
–
Aux.
G
O/B
O/B
O/B
O/B
L
E
–
W2
Y2
M13209
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